How to Use the JavaScript Fetch API to Get Data
fetch('http://api.steampowered.com/ISteamUserStats/GetGlobalAchievementPercentagesForApp/v0002/?gameid=221380')
.then(function(response) {
return response.json();
})
.then(function(myJson) {
console.log(JSON.stringify(myJson));
});fetch to get data from server
fetch(url).then(function(response) {
response.text().then(function(dataFromServer) {
//do stuff
});
});how to use fetch() javascript
//Most API's will only allow you to fetch on their website.
//This means you couldn't run this code in the console on
// google.com because:
// 1. Google demands the fetch request be from https
// 2. open-notify's API blocks the request outside of their website
fetch('http://api.open-notify.org/astros.json')
.then(function(response) {
return response.json();
})
.then(function(json) {
console.log(json)
});
// Here is another example. A method (function) that
// grabs Game of Thrones books from an API ...
function fetchBooks() {
return fetch('https://anapioficeandfire.com/api/books')
.then(resp => resp.json())
.then(json => renderBooks(json));
}
function renderBooks(json) {
const main = document.querySelector('main')
json.forEach(book => {
const h2 = document.createElement('h2')
h2.innerHTML = `<h2>${book.name}</h2>`
main.appendChild(h2)
})
}
document.addEventListener('DOMContentLoaded', function() {
fetchBooks()
})get data from fetch response html
fetch('/about').then(function (response) {
// The API call was successful!
return response.text();
}).then(function (html) {
// Convert the HTML string into a document object
var parser = new DOMParser();
var doc = parser.parseFromString(html, 'text/html');
// Get the image file
var img = doc.querySelector('img');
console.log(img);
}).catch(function (err) {
// There was an error
console.warn('Something went wrong.', err);
});Copyright © 2021 Codeinu
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